CN104163432A - Acidized vermiculite - Google Patents

Acidized vermiculite Download PDF

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Publication number
CN104163432A
CN104163432A CN201410358767.1A CN201410358767A CN104163432A CN 104163432 A CN104163432 A CN 104163432A CN 201410358767 A CN201410358767 A CN 201410358767A CN 104163432 A CN104163432 A CN 104163432A
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China
Prior art keywords
vermiculite
batching
acidifying
acidized
flap
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CN201410358767.1A
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CN104163432B (en
Inventor
管永祥
朱玫
孙华
王子臣
金白云
许庆华
蒋文兰
许盛英
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JIANGSU ACADEMY OF AGRICULTURAL ENVIRONMENTAL MONITORING AND PROTECTION STATION
JIANGSU NONGSHENG WASTE RECYCLING Co Ltd
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JIANGSU ACADEMY OF AGRICULTURAL ENVIRONMENTAL MONITORING AND PROTECTION STATION
JIANGSU NONGSHENG WASTE RECYCLING Co Ltd
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Abstract

The invention discloses an acidized vermiculite. Main points of the technical scheme are as follows: ingredients of the acidized vermiculite are composed of expanded vermiculite, attapulgite clay, magnesium oxide, sulfuric acid, instant sodium silicate, polyvinyl alcohol, hydroxypropyl methyl cellulose and sodium carbonate; the ingredients of the acidized vermiculite are inputted into a grinding machine for milling; and a powder obtained after milling is the acidized vermiculite. According to the production method of the acidized vermiculite, acidification is carried out before composite dosing so as to avoid a chemical reaction between sulfuric acid and instant sodium silicate, polyvinyl alcohol, hydroxypropyl methyl cellulose and sodium carbonate; and after vermiculite is acidized, pH value is controlled within 5.0-7.0, and utilization rate of expanded vermiculite can be raised. The acidized vermiculite has good adsorptivity, thixotropy, thermal stability, plasticity and caking property. The acidized vermiculite is suitable for production of environmental protection materials, garden materials, building materials, foaming agents and fire products.

Description

Vermiculite after acidifying
Technical field
The present invention relates to acidification, be specifically related to the vermiculite after a kind of acidifying.
Background technology
Vermiculite is a kind of natural, nontoxic mineral substance, dilatable mineral under high temperature action.It is a kind of more rare mineral, belongs to silicate.Its crystalline structure is oblique system, and profile, it looks and looks like mica.Because vermiculite has the ability of ion-exchange, it has great effect to the nutrition of soil.
Vermiculite is a kind of clay mineral similar to montmorillonite, is the silicate of laminate structure.Generally formed through hydrothermal alteration or weathering by biotite.Trickle the soil shape that becomes when it has with thick biotite appearance sometimes.When vermiculite is heated to 300 DEG C, it can expand 20 times and bend.Vermiculite is generally brown, yellow, sap green, have the gloss that oil is the same, grizzle after heating.Fabric and raw-vermiculite sheet is after high-temperature roasting, and its volume energy expands rapidly several times to tens times, and the vermiculite after volumetric expansion is just expanded vermiculite,
In nature, in the solution of hot spring, produced by mineral such as biotite.Clay in nature in they and soil mixes, and cannot from clay, branch away.
In order to improve the application quality of vermiculite, need to carry out acidification to vermiculite.
Summary of the invention
The object of the invention is to overcome weak point in prior art, the vermiculite after a kind of acidifying is provided.
Vermiculite batching after acidifying is made up of expanded vermiculite, attapulgite clay, magnesium oxide, sulfuric acid, quick dissolved sodium silicate, polyvinyl alcohol, Vltra tears and sodium carbonate.
The production method of the vermiculite after acidifying: by abrasive dust in the vermiculite batching input grinding machine after acidifying, the meal after abrasive dust is the vermiculite after acidifying.
Vermiculite is a kind of natural, nontoxic silicate mineral, dilatable mineral under high temperature action, fabric and raw-vermiculite sheet is after high-temperature roasting, and its volume energy expands rapidly several times to tens times, vermiculite after volumetric expansion, expanded vermiculite, is one of the lightest in the world mineral.
Expanded vermiculite has very strong thermal and insulating performance, cationic exchange and adsorptivity, also has good water-absorbent, sound-proofing, frost resistance, thermal insulation and resistivity against fire, the stable chemical nature of expanded vermiculite.The present invention selects the expanded vermiculite after pulverizing, particle fineness≤0.5 millimeter of expanded vermiculite.
Attapulgite clay has unique layer chain-like structure feature, and crystal is needle-like, fibrous or fiber collection shape.Attapulgite clay has unique dispersion, high temperature resistant, the anti-good colloidal property such as saline and alkaline and higher adsorptive power, and has certain plasticity-and cohesive force, and the present invention selects particle fineness≤5 millimeter of attapulgite clay.
Magnesium oxide has the general character of basic oxide, belongs to gelling material, can improve the colloidal property of vermiculite.
It is 98% the vitriol oil that sulfuric acid is selected concentration.
Quick dissolved sodium silicate is white pulverulent material, can be dissolved in fast water, has that cohesive force is strong, intensity is higher, acid resistance, good heat resistance, the feature of alkali resistance and poor water resistance.
Polyethenol series white solid, that external form is divided is cotton-shaped, particulate state, Powdered three kinds; Nonpoisonous and tasteless, particulate state can be dissolved in 80--90 DEG C of water, pulverously after other powders pre-dispersed, can dissolve at normal temperatures.There is good viscosity, polymerizability, cohesiveness and water-retentivity.
Vltra tears has thickening capabilities, salt discharge, pH stability, water-retentivity, dimensional stability, good film-forming properties and the feature such as resistance to enzyme, dispersiveness and cohesiveness widely.
Sodium carbonate has the general character and the thermostability of salt, soluble in water, and its aqueous solution is alkalescence, in the present invention for adjusting the vermiculite pH value after acidifying.
The present invention is achieved by following technical proposals:
1, the batching of the vermiculite after acidifying is made up of following component by weight percentage: vermiculite work in-process 90~98%, quick dissolved sodium silicate 0.1~5%, polyvinyl alcohol 0.1~5%, Vltra tears 0.01~3% and sodium carbonate 0~3% after acidifying.
2, the production method of the vermiculite after acidifying: by abrasive dust in the vermiculite batching input grinding machine after acidifying, particle fineness≤0.074 millimeter, the meal after abrasive dust is the vermiculite finished product after acidifying.
3, the half-finished production method of the vermiculite after acidifying: stir in the stirrer (1) input of the batching of vermiculite mixture having been turned round, then dilute sulphuric acid is slowly added and carries out acidification in vermiculite mixture; (2) by the vermiculite mixture after acidification, push as vermiculite flap thickness≤3 millimeter of vermiculite flap by twin rollers; (3) vermiculite flap is transported to roasting in rotary type stoving oven, roasting time is 1~3 hour, and maturing temperature is controlled at 300~400 DEG C, vermiculite flap water content≤2% after roasting, vermiculite flap after roasting is the vermiculite work in-process after acidifying, and PCm is weight percentage.
4, the batching of vermiculite flap is made up of following component by weight percentage: vermiculite mixture 75~95% and dilute sulphuric acid 5~25%.
5, the batching of vermiculite mixture is made up of following component by weight percentage: expanded vermiculite 68~92%, attapulgite clay 5~30% and magnesium oxide 0.1~3%.
6, the batching of dilute sulphuric acid is made up of following component by weight percentage: the vitriol oil 1~25% that concentration is 98% and water 75~99%, the vitriol oil per-cent that concentration is 98% is weight percentage.
The production method of the vermiculite after acidifying takes first acidifying to carry out compounding ingredient again, can avoid sulfuric acid and quick dissolved sodium silicate, polyvinyl alcohol, Vltra tears and sodium carbonate generation chemical reaction, give full play to raw-material characteristic separately in batching, and obtain complementation, guarantee the vermiculite inner quality after acidifying.
According to the needs of quality product, adopt sodium carbonate to adjust the vermiculite pH value after acidifying, method is simple.
After the acidified processing of expanded vermiculite, pH value is controlled at 5.0~7.0, can improve the utilization ratio of expanded vermiculite.
Vermiculite after acidifying has good adsorptivity, thixotropy, thermostability, plasticity-and close-burning feature.
Vermiculite after acidifying is applicable to produce environment-friendly materials, Landscape Material, material of construction, whipping agent and fire product.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
1, the batching of the vermiculite after acidifying is made up of following component by weight percentage: vermiculite work in-process 95%, quick dissolved sodium silicate 2%, polyvinyl alcohol 2.2%, Vltra tears 0.8% and sodium carbonate 0% after acidifying.
2, the production method of the vermiculite after acidifying: by abrasive dust in the vermiculite batching input grinding machine after acidifying, particle fineness≤0.074 millimeter, the meal after abrasive dust is the vermiculite finished product after acidifying.
3, the half-finished production method of the vermiculite after acidifying: stir in the stirrer (1) input of the batching of vermiculite mixture having been turned round, then dilute sulphuric acid is slowly added and carries out acidification in vermiculite mixture; (2) by the vermiculite mixture after acidification, push as vermiculite flap thickness≤3 millimeter of vermiculite flap by twin rollers; (3) vermiculite flap is transported to roasting in rotary type stoving oven, roasting time is 2 hours, and maturing temperature is controlled at 300~350 DEG C, vermiculite flap water content≤2% after roasting, and the vermiculite flap after roasting is the vermiculite work in-process after acidifying.
4, the batching of vermiculite flap is made up of following component by weight percentage: vermiculite mixture 78% and dilute sulphuric acid 22%.
5, the batching of vermiculite mixture is made up of following component by weight percentage: expanded vermiculite 7476%, attapulgite clay 22% and magnesium oxide 2%.
6, the batching of dilute sulphuric acid is made up of following component by weight percentage: the vitriol oil 6% that concentration is 98% and water 94%.

Claims (7)

1. the vermiculite after an acidifying, it is characterized in that, the vermiculite batching after acidifying is made up of following component by weight percentage: vermiculite work in-process 90~98%, quick dissolved sodium silicate 0.1~5%, polyvinyl alcohol 0.1~5%, Vltra tears 0.01~3% and sodium carbonate 0~3% after acidifying.
2. the production method of the vermiculite after acidifying according to claim 1, is characterized in that, by abrasive dust in the vermiculite batching input grinding machine after acidifying, and particle fineness≤0.074 millimeter, the meal after abrasive dust is the vermiculite finished product after acidifying.
3. the half-finished production method of vermiculite after acidifying according to claim 1, is characterized in that, stirs, then dilute sulphuric acid is slowly added and in vermiculite mixture, carries out acidification in the stirrer (1) input of the batching of vermiculite mixture having been turned round; (2) by the vermiculite mixture after acidification, push as vermiculite flap thickness≤3 millimeter of vermiculite flap by twin rollers; (3) vermiculite flap is transported to roasting in rotary type stoving oven, roasting time is 1~3 hour, and maturing temperature is controlled at 300~400 DEG C, vermiculite flap water content≤2% after roasting, and the vermiculite flap after roasting is the vermiculite work in-process after acidifying.
4. the batching of vermiculite flap according to claim 3, is characterized in that, the batching of vermiculite flap is made up of following component by weight percentage: vermiculite mixture 75~95% and dilute sulphuric acid 5~25%.
5. the batching of vermiculite mixture according to claim 4, is characterized in that, the batching of vermiculite mixture is made up of following component by weight percentage: expanded vermiculite 68~92%, attapulgite clay 5~30% and magnesium oxide 0.1~3%.
6. the batching of dilute sulphuric acid according to claim 4, is characterized in that, the batching of dilute sulphuric acid is made up of following component by weight percentage: the vitriol oil 1~25% that concentration is 98% and water 75~99%.
7. the batching of vermiculite mixture according to claim 5, is characterized in that, selects particle fineness≤0.5 millimeter of expanded vermiculite, particle fineness≤5 millimeter of attapulgite clay.
CN201410358767.1A 2014-07-27 2014-07-27 Vermiculitum after acidifying Active CN104163432B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106975451A (en) * 2017-05-17 2017-07-25 合肥绿洁环保科技有限公司 A kind of preparation method of quick adsorption Powdered Activated Carbon
CN107626113A (en) * 2017-10-19 2018-01-26 曹美兰 A kind of plant extract device
CN113415806A (en) * 2021-07-30 2021-09-21 塔里木大学 Method for expanding microparticle vermiculite

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1544538A (en) * 2003-11-14 2004-11-10 华南理工大学 Organic modified phyllosilicate and method for preparing same
CN1611450A (en) * 2003-10-31 2005-05-04 中国石油化工股份有限公司 Waste water purifying agent, and its preparing method and use
CN101531494A (en) * 2009-03-27 2009-09-16 许盛英 Attapulgite washable inner wall paint
CN102658106A (en) * 2012-05-10 2012-09-12 中国科学院新疆理化技术研究所 Method for preparing acidification stripped vermiculite supported TiO2 photocatalyst
CN103864335A (en) * 2014-01-25 2014-06-18 李茜 Preparation method of admixture taking kieselguhr as main raw material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1611450A (en) * 2003-10-31 2005-05-04 中国石油化工股份有限公司 Waste water purifying agent, and its preparing method and use
CN1544538A (en) * 2003-11-14 2004-11-10 华南理工大学 Organic modified phyllosilicate and method for preparing same
CN101531494A (en) * 2009-03-27 2009-09-16 许盛英 Attapulgite washable inner wall paint
CN102658106A (en) * 2012-05-10 2012-09-12 中国科学院新疆理化技术研究所 Method for preparing acidification stripped vermiculite supported TiO2 photocatalyst
CN103864335A (en) * 2014-01-25 2014-06-18 李茜 Preparation method of admixture taking kieselguhr as main raw material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106975451A (en) * 2017-05-17 2017-07-25 合肥绿洁环保科技有限公司 A kind of preparation method of quick adsorption Powdered Activated Carbon
CN107626113A (en) * 2017-10-19 2018-01-26 曹美兰 A kind of plant extract device
CN107626113B (en) * 2017-10-19 2020-04-10 曹美兰 Plant extraction element
CN113415806A (en) * 2021-07-30 2021-09-21 塔里木大学 Method for expanding microparticle vermiculite

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